<template>
  <div>
    <div class="search">
      <input
          v-model="keyword"
          class="search-input"
          placeholder="请输入城市名或拼音"
          type="text"/>
    </div>
    <div v-show="keyword" ref="search" class="search-content">
      <ul>
        <li v-for="item of list"
            :key="item.id"
            class="search-item border-bottom"
            @click="handleCityClick(item.name)"
        >
          {{ item.name }}
        </li>
        <li v-show="hasNoData" class="search-item border-bottom">
          没有找到匹配数据
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {computed, onMounted, ref, watch} from "vue";
import {useStore} from "vuex";
import {useRouter} from "vue-router";

export default {
  name: 'Search',
  props: {
    cities: Object
  },
  setup(props) {
    const keyword = ref('')
    const list = ref([])
    const search = ref(null)
    let timer = null
    const store = useStore()
    const router = useRouter()
    const hasNoData = computed(() => {
      !list.value.length
    })
    watch(keyword, (keyword, prevkeyword) => {
      if (timer) {
        clearTimeout(timer)
        timer = null
      }
      if (!keyword) {
        list.value = []
        return
      }
      timer = setTimeout(() => {
        const result = []
        for (let i in props.cities) {
          props.cities[i].forEach((value) => {
            if (value.spell.indexOf(keyword) > -1 ||
                value.name.indexOf(keyword) > -1) {
              result.push(value)
            }
          })
        }
        list.value = result
      }, 100)
    })

    function handleCityClick(city) {
      store.commit('changeCity', city)
      router.push('/')
    }

    onMounted(() => {
      new Bscroll(search.value, {
        click: true
      })
    })
    return {list, keyword, hasNoData, search, handleCityClick}
  }
}
</script>

<style lang="stylus" scoped>
@import "~styles/vaibles.styl"
.search
  height .67rem
  background $bgColor
  padding .15rem .3rem .15rem .3rem

  .search-input
    box-sizing border-box
    width 100%
    height .62rem
    padding 0 .2rem
    line-height .62rem
    text-align center
    border-radius .1rem
    color #666

.search-content
  z-index 1
  overflow hidden
  position absolute
  top 2.1rem
  left 0
  right 0
  bottom 0
  background #eee

  .search-item
    line-height .62rem
    padding-left .2rem
    background #fff
    color #666

</style>
